Gumout 800001365 Regane High Mileage Fuel System Cleaner, 6 oz.

I use this on both my high mileage cars right after each oil change. Both vehicles run smoother and faster after use. It does its job well

My wife's car starts faster and easier. Has noticeably more acceleration after 2 bottles. We started using it for the first time after 200,000 miles. I seriously believe it has made a tremendous difference. We put in a bottle about every 3000 miles. I'm starting to put it in my truck next!!!

My '97 Toyota 4Runner with 170k miles was starting to run rough and read some reviews that since this product contains PEA (polyether Amine) it could help remove some of the carbon build up in the heads and pistons. I put in a bottle when my tank was nearing empty and refilled. The car ran noticeably smoother after a short while. Has not really made any impact on fuel economy from what I can tell but idles smoother and seems to have a bit more power.I also tried a bit in my Honda lawn mower since it was having a tougher time starting and rough idling. The difference was immediate as the engine fired up on the fist pull and has been running smoother. I am sold on this product and just ordered the Gumout Regane Complete Fuel Cleaner 80001364 (the non high mileage version) to try in my other newer vehicles to see if power or mileage improves.

I was a little skeptical BUT it did take a couple bottles (3) to increase fuel mileage. Did one bottle a couple months ago with little to no gain then decided to try another and waited till tank was close to empty to pour in and ran for 50-60 miles then only filled with a few gallons and another bottle. Wish I'd have take pics of computer fuel mileage.... 1.3 mpg increase. yes... 1.3

PEA that is in a very good % of this product is what scientists have discovered that helps clean more carbon out of combustion chamber and valves than any other cleaners. Redline SI-1 is the only other PEA ADDITIVE that has that key ingredient in it.I have used liquidmoly jectron & BG-4KK with great results in mileage gains.I use to use cans of B12-chemtool since it's better than seafoam as b12 has the hest technology.But above all I'm sold on Gumout Regane HM cleaner. The PEA is something you yourself needs to do some research on and this is great for doing what it's designed to do. Clean valves and pistons.